Explain the culprit and consequences of the 1GB memory recommendation.
 Merge branch 'clone-explanation' into 'master'

Explain where the memory recommendation comes from

The 250MB repo limit is caused by the git command line.

Also see MR !422
add O'Reilly sponsorship in CHANGELOG
 Merge branch 'changelog-base64' into 'master'

Changelog Base64

Add O'Reilly sponsorship in CHANGELOG